Given that the engines i have have not been run in nearly a decade, I think I'm going to re-build them. I've seen the great info on the web that is a precis of a rotax rebuild but was wondering if there is any actual published maintenance or overhaul manual for the 185??

Have a look at the ultralight news website. www.ultralightnews.com. You will find a couple of very helpful rebuild documents there for the 185 Rotax. There's a lot of interesting information on a variety of things there, and the manuals are pretty easy to find. I used them when I rebuilt my engines and found that all of the information required, torque values etc., was there.